Doux Theoktistos of Thessalonika

Theoktistos Kyritzios (734-5 January 770) was the doux of Thessalonika under the Byzantine Empire. Theoktistos was one of Emperor Constantine V Kopronymos' commanders during his war against the Addauid Emirate, and he was killed in battle with Emir Abd al-Kadir of Addauid Emirate in January 770.